dmagyar;1132685
Don't laugh, but I still use a clamp-on
with an Analog Moving-Needle, $50.
This old one has faster than 1/25 second response time full scale.
I mean, it will pin full scale on motor in-rush, and you can watch the decay.
I have watched the Bass from a stereo load the circuit,
differentiating the loose service neutral problem,
during a trouble shooting session.
Not as good as having my O'scope connected to the line,
but right nice and handy.
I can get a good indication of motor in-rush, and eye-ball its decay.
That ability to catch fast moving fluctuations
can tell you a lot when the circuit has problems.
I still use it, although I have digital meters.
See, when the digitals came out,
their sample rate was about once per second for the double-ramp circuits.
Only a stable circuit could be read with any accuracy,
because the sampling was summed for a full second,
before being sent to the LED display.
Any fluctuations in load were lost forever, very erratic.
Nowadays, the sample rate should be more like 1/5 second,
but I would not trust that for full scale possibilities.
Anyway, For a Moving Target you need a response time
twice as fast as the target signal (Nyquist theorem).
For the common static load reads, anything would do,
and I think a 1% accurate meter is too accurate.
That's my opinion.
